Alarm device.



J. MARSHAK.

ALARM DEVIGEV APYLIOATION FILED we. 19, 1911.

Patented Aug. 27, 1912.

COLUMBIA PLANOORAP". co.,wAsrl|NflTON. D. c.

.rnron JACOB IVIAESI-IAK, OF NEW HAVEN, CONNECTICUT, ASSIG-NOR OFONE-HALF IO SAMUEL GOODMAN, OF NEW HAVEN, CONNECTICUT.

ALARM DEVICE.

Specification of Letters Patent.

Patented Aug. 27, 1912.

To all whom it may concern:

Be it known that I, JACOB MARsniAn, a subject of Nicholas II, Emperor ofRussia, residing at New Haven, in the county of New Haven, State ofConnecticut, United States of America, have invented certain new anduseful Improvements in Alarm Devices, of which the following is aspecification, reference being had therein to the accompanying drawings.

My invention relates to new and useful improvements in alarm devices,and more particularly to a device that Wlll automatlcally announce thestarting of a fire, preferably through the ringing of a bell, and hasfor its object, among other things, to pro vide such a device, that willbe neat and pleasing in appearance, positive in its operation, andcomposed of few parts, so designed as to be economically and readilyassembled at the minimum cost.

To these, and other ends, my invention consists in the alarm device,having certain details of construction and combinations of parts, aswill be hereinafter described and more particularly pointed out in theclaims.

Referring to the drawings, in which like numerals of reference designatelike parts in the several figures: Figure 1 is a plan view of my devicecomplete; Fig. 2 is a front elevation thereof; Fig. 3 is a sideelevation thereof; Fig. 4 is a view of the underside of the device; Fig.5 is a sectional view thereof upon line AB of Fig. 1; and Fig.

6 is a sectional view upon line CD of Fig. 1.

In the practice of my invention I provide a base member 1, which ispreferably, al-

though not necessarily, of circular form,-

and may be secured to a wall or other surface by a screw 2, which passestherethrough (see Fig. This block is made of glass, fiber, or othernon-conducting material, and within the opening 3 therein projects thelower end of a sleeve 4, having a radial arm 5 thereon, secured to thebase member 1 by the screw 6, which is threaded into the retaining plate7.

Diametrically opposite the radial arm 5 is the plate 8, that is securedto the base member by the screw 9 that passes therethrough and threadedinto the retaining plate 10.

Movable axially within the bore of the.

sleeve t is the plug 11, terminating at its lower end in the headportion 12. Fixed to the upper end ofthe sleeve 1 is a collar 13, withinwhich is secured the opposite ends of a retaining loop 35, which ispreferably formed with the coils 15, and 16 for the purpose of insuringrigidity thereto.

Extending through the base member 1, parallel to the opening 3, is theopening 17, within which is fixed the bushing 18, into which is threadedthe shank of the electric lamp 19.

Rotatably mounted on the sleeve 4, by

any desired means, is the test arm 20, the

movement of which is limited in one direction by the contact pin 21connected with the bushing 18 as shown by dottodlines in Fig. 1.

A cover 22 that conceals the mechanism and gives a neat and pleasingappearance to the front of the device, is secured to the sleeve 4between the integral collar 23 and the collar 13, the radial slot 24therethrough providing ample space for movement of the upwardlyprojecting portion of the test arm 20. I prefer to provide this slot inthe cover member for the movement of the test arm 20, but it may beomitted if desired, and the arm made sufficiently long to extend outsideof said cover member.

Suitable wires 25 and 26 are respectively secured to the plate 8 andarm5 by the screws 27 in a well known manner, which wires are connectedwith a bell 28 and a battery 29.

The plug 11 is held in its up posit-ion against the tension of thespring 30, as shown in Fig. 5, by the wire connection 31,

that passes through an opening 32 near the top of said plug and the coil16. This wire connection is made of metal that will melt at a very lowtemperature, and in order that the same will be melted at the earliestpossible moment, when a fire starts, I attach thereto .an arm 33 ofcelluloid or other highly inflammable material, which will catch fireand burn at a much less heat than is required to melt the wireconnection.

It will be observed that when the device is set, that the electriccircuit is broken, there being no electric connection between the arm 5and the plate 8, the plug 11 being held in its up position by reason ofthe connection 31. If, however, it is desired to test the electriccircuit, the test arm 20 is moved about the sleeve 4 from the positionshown by full lines in Fig. 1 until it engages the contact pin 21, atwhich time the circuit is closed through the bushing 18 and the springarm 34, integral with the plate 10, and the lamp will be lighted if thecircuit is complete and in working order. In case a firest-arts in thevicinity of one of these devices the heat will set the arm 33 on fire,which will create sufiicientheat to melt the wire connection 31 andrelease the plug 11 that is moved by the spring 30, so .that the end'thereof contacts with the plate 10, thereby closing the circuit andcausing the bell 28 to ring.

These devices may be located at convenient places in the house, businessoffice or factory, hotels or other places, and the bell arranged at apoint where notice will be immediately taken of the ringing thereof.

The bell may even be placed outside of an unoccupied building, ifdesired.

There are minor changes and alterations that can be made within mymvent-lon, aside 1 her and electrically engaging the same, a

fixed contact adapted to be engaged by the 'movable contact, a devicewhich at'normal temperature holds themovable contact sepa- "rated fromthe fixed contact, a testing device on the base having one terminalconnected with the fixed contact, a circuit including a signal, and asource of current connected with the fixed contact andwith the saidmember, and a secondary contact mounted on the said metallic member andmovable'into electrical connection with the other terminalof the testingdevice to close the circuit through the latter while the main movablecontact is held out of engagement with the fixed contact for testingsaid de- V106. 55 2. An apparatus of the class described "comprising asupporting base, a metal sleeve mounted thereon, a movable contact in.the sleeve and electrically connected therewith, a fixed contactarranged on thebase to be engaged by the movable contact, means in thesleeve for'urging the movable contact toward the fixed contact, afusible element for holding the contact separated against the actionofthe said means, a testing device on the base having one terminal con-.

nected with the fixed contact, a circuit connected with the fixedcontact and with the said sleeve, and a movable contact carried by andelectrically connected with the sleeve and movable into electricalconnection with the other terminal of the testing device for closing thecircuit through the latter.

, 3. An apparatus of the. class described, comprising a base, a sleevethereon, a movable contact in the sleeve, a fixed contact on the baseadapted to be engaged by the movable contact, a normally open signalcircuit closed by the'engagement of the movable with the fixed contact,a fusible element for holding the movable contact out of engagement withthe fixed contact, a testing device on the base having one terminalconnected with the fixed contact, a cover fastened to the sleeve andattached thereby to the base, a contact movable on the sleeve anddisposed between the cover and base and movable into electricalconnection with the other ter minal of the testing device to close thecircuit through the latter.

4. An apparatus of the class described comprising a supporting base, ametallic sleeve, a movable contact in the sleeve and having its endsextending therefrom, a fixed contact on the base adapted to be.engagedby one end of the movable contact, a spring in the sleeve and operatingon themovable contact to urge the latter into engagement with the fixedcontact, a frame on the sleeve, a fusible element connected with theframe and with the end of the movable contact opposite from the fixedcontact, a testing device on the base, a signal circuit connect-ed withthe fixed contact and with the sleeve to; be closed when the movablecontact engages the fixed contact upon the fusing of the said element,and means for closing the circuit through the testing device when thesaid contacts are separated. i

5; An apparatus of the class described comprising a base, a testingdevice thereon,

'a sleeve having one end anchored in the base and projecting upwardlytherefrom, a movable contact in the sleeve, a fixed'contact connectedwith one terminal of the testing device, means in the sleeve tending tomove the movable contact into engagement with the fixed contact, atesting cont-act mounted on the sleeve and movable thereon forconnection with the other terminal of the testing device to close thecircuit through the latter when the fixed and movable contacts areseparated, a base cover on the uper end of the sleeve, a shoulder on thesleeve against which the cover bears, a collar fastened to the sleevefor retaining the cover in place, a device carried by and extendingoutwardly from the "collar, said movable contact having a portionextending out of the upper end of the movable contact to hold the latterat normal temperature out of engagement with the fixed contact.

6. An apparatus of the class described comprising a base having anopening, a sleeve fitted in the opening with one end extendingtherefrom, a movable contact in the sleeve, a fixed contact on the baseadapted to be engaged by the movable contact, a spring in the sleeveacting on the movable contact to urge the same toward the fixed contact,means for connecting the sleeve and fixed contact with the signalcircuit, said movable contact having one end projecting from the sleeve,a fusible element connected with the projecting end of the movablecontact, a frame secured on the sleeve and to which the fusible elementis connected, and a cover secured on the sleeve between the base andframe.

In testimony whereof I afiix my signature in presence of two witnesses.

JACOB MARSHAK. Witnesses:

GEORGE E. HALL, FLORENCE H. MONK.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

